How to implement conditional flows

[v.g]

Hi all

I am learning jBPM and I am using the BPMN2 editor tentative release taken from:

http://download.eclipse.org/bpmn2-modeler/site

I am trying to implement a conditional flow, so I added a Xor gateway and two outogoing sequence flows from upper and lower corners.

I set the gateway as diverging, but I couldn't find a way to set the constraints.

I checked the documentation and I understood that the constraints had to be added as conditions in the outgoing flows. But neither there I could find a way to set any condition.

I thought that this part still was not implemented, so I edited manually the bpm file adding the child to bpmn2:sequenceFlow :

 <conditionExpression id="flow2_condition" body="eval(! $msgs.isRequestMsgEmpty() );"/>

But I got the error message

FeatureNotFoundException: Feature 'conditionExpression' not found.

Is there something I am doing wrong or is it something still to be implemented ?

In the second case where I can find some bpmn2 sample files ?

Thanks

Vincenzo

[tsurdilovic]

Hi Vincenzo, the new BPMN2 Editor for Eclipse is still in it's early stages and I would recommend to use the existing Rule-Flow editor which get's installed if you are using the jBPM installer and/or the jBPM Web Designer which also gets installer for you by the jBPM installer. The Eclipse Rule-Flow editor is currently the most stable followed by the web designer, but both feature-wise and stability-wise are currently better.

Hope this helps.

[v.g]

Actually Tihomir I wanted to prepare for the future. I hope flows defined in BPMN2 will replace rule-flows, so I was thinking about integration projects where you edit  rules java code and processes in the same IDE.

For the moment I thought that editing manually the files would have allowed to compensate for what still is not implemented.

But actually I didn't understand whethe I got the error message because the xml is wrong or because I have the wrong jars in the classpath or other reasons.

[tsurdilovic]

You can find a number of examples here: https://github.com/droolsjbpm/jbpm/tree/master/jbpm-bpmn2/src/test/resources.

Take a look at BPMN2-ExclusiveSplit.bpmn2 to see an example of a conditionalExpression in sequenceFlow.

Hope this helps.

[v.g]

Thanks Tihomir those process samples are a good starting point.

I solved the error when I found out that the tag "conditionExpression" is correct, but the condition in in the text of the node, not in an attribute named body.